Patuxent Home

USGS Patuxent Wildlife Research Center Staff Profile

Nav Bar link Staff Profiles Nav Bar Link Patuxent Nav Bar Link Biological Resources Nav Bar Link USGS Nav Bar Link Interior Navigation Bar

Mary C. Freeman

USGS Patuxent Wildlife Research Center
Institute of Ecology
University of Georgia
Athens, GA 30602-2202

Photo of Mary C. Freeman

Telephone: 706-583-0978

Fax: 706-542-1235


Research Ecologist

Primary Responsibilities: 
Conducting research on linkages between hydrology, land use and the ecology and distribution of freshwater fishes and invertebrates, to provide information useful to federal and state natural resource managers and other stakeholders involved in river and land use management, including streamflow and water allocation decisions.


Ph.D., University of Georgia, Athens, GA 1990; Forest Resources
M.S., University of Georgia, Athens, GA 1982; Entomology
B.S., University of Georgia, Athens, GA 1979, Summa Cum Laude; Biology

Areas of Expertise/Interest: Aquatic ecology, freshwater fishes, conservation biology

Active Projects: 
Predicting and monitoring the persistence of imperiled stream fishes

Water availability for ecological needs – Flint River, GA


Freeman, M. C., C. M. Pringle and C. R. Jackson.  2007. Hydrologic connectivity and the contribution of stream headwaters to ecological integrity at regional scales.  Journal of the American Water Resources Association 43:5-14.

Roy, A. H., B. J. Freeman and M. C. Freeman.  2007. Riparian influences on stream fish assemblage structure in urbanizing streams. Landscape Ecology 22:385-402.

Freeman, M. C. and P. A. Marcinek.  2006.  Fish assemblage responses to water withdrawals and water supply reservoirs in Piedmont streams.  Environmental Management 38: 435-450.

Anderson, E. P., M. C. Freeman and C. M. Pringle.  2006.  Ecological consequences of hydropower development in Central America: impacts of small dams and water diversion on neotropical stream fish assemblages.  River Research and Applications 22:397-411.

Roy, A. H., M. C. Freeman, B. J. Freeman S. J. Wenger, J. L. Meyer, and W. E. Ensign. 2006.  Importance of riparian forests in urban catchments contingent on sediment and hydrologic regimes.  Environmental Management 37:523-539.

Freeman, M. C., E. R. Irwin, N. M. Burkhead, B. J. Freeman and H. L. Bart, Jr.  2005.  Status and conservation of the fish fauna of the Alabama River system.  Pages 557-585 in J. N. Rinne, R. M. Hughes and R. Calamusso  (editors), Historical Changes in Large River Fish Assemblages of the Americas, American Fisheries Society Symposium 45, Bethesda, Maryland.

Walters, D. M., M. C. Freeman, D. S. Leigh, B. J. Freeman, and C. M. Pringle. 2005. Urbanization effects on fishes and habitat quality in a southern Piedmont river basin. Pages 69-85 in L. R. Brown, R. H. Gray, R. M. Hughes and M. R. Meador (editors), Effects of Urbanization on Stream Ecosystems, American Fisheries Society Symposium 47, Bethesda, Maryland.

Freeman, M. C., C. M. Pringle, E. A. Greathouse and B. J. Freeman.  2003.  Ecosystem-level consequences of migratory faunal depletion caused by dams.  In: K. E. Limburg and J. R. Waldman (editors) Biodiversity and Conservation of Shads Worldwide, American Fisheries Society Symposium 35:255-266, Bethesda, Maryland.

Irwin, E. R. and M. C. Freeman.  2002.  A proposal for adaptive management to conserve biotic integrity in a regulated segment of the Tallapoosa River, Alabama (U.S.A.).  Conservation Biology 16:1212-1222.

Freeman, M.C., Z. H. Bowen, K. D. Bovee and E. R. Irwin.  2001.  Flow and habitat effects on juvenile fish abundance in natural and altered flow regimes.  Ecological Applications 11:179-190.

Return to Staff Profiles Listing

Nav Bar link Staff Profiles Nav Bar Link Patuxent Nav Bar Link Biological Resources Nav Bar Link USGS Nav Bar Link Interior Navigation Bar